I figured it would make sense to update the bitcoin wiki with the news that chargebacks could happen. So I went to
Dwolla - Bitcoinand was surprised to see this text. It was added back on 2011-01-08 in
this edit:
Risks
ACH fraud can occur (e.g., stolen account used to make payments, account holder falsely disputes a transaction they had authorized, etc.) so there is the risk of ACH chargebacks. In some circumstances, an ACH chargeback can occur within 180 days of the transaction. Payment cards (neither credit card nor debit card) are not used to fund Dwolla accounts thus the relatively common payment card chargeback is not a factor for Dwolla transactions.
I wonder what the source for this claim was.
Here is a link about
ACH chargebacks